A FRR security update has been released for Ubuntu Linux 22.04 LTS and 23.04.

[USN-6323-1] FRR vulnerability

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Ubuntu Security Notice USN-6323-1
August 31, 2023

frr vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.04
- Ubuntu 22.04 LTS

Summary:

FRR could be made to close sessions if it received speacially
crafted network traffic.

Software Description:
- frr: FRRouting suite of internet protocols

Details:

Ben Cartwright-Cox discovered that FRR did not handle RFC 7606
attributes properly. A remote attacker could possibly use this to
cause denial of service.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.04:
frr 8.4.2-1ubuntu1.3

Ubuntu 22.04 LTS:
frr 8.1-1ubuntu1.5

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-6323-1
CVE-2023-31490

Package Information:
https://launchpad.net/ubuntu/+source/frr/8.4.2-1ubuntu1.3
https://launchpad.net/ubuntu/+source/frr/8.1-1ubuntu1.5